The information provided in this document is subject to change without notice.

Arima Computer Corp. makes no warranty regarding this document.

Always read the safety instructions carefully.

Arima Computer Corp. cannot anticipate all of your working conditions; for safety, you should use caution, care and good judgment when following the procedures described in this material. Arima Computer Corp. shall not be liable for errors contained in this material nor any damage incurred in the use of this material.

Arima Computer Corp. assumes no responsibility for any damage to property, injury to persons, or losses incurred as a result of misuse of the information provided.

Arima Computer Corp. assumes no responsibility for the reliability of its software on equipments that are not manufactured by Arima Computer Corp..

Copyright Notice

This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this publication may be reproduced, transcribed, stored in a retrieval system, translated into any language or computer language, or transmitted in any form whatsoever without the prior written consent of Arima Computer Corp.. We reserve the right to make changes to this document without notice.

Super I/O is the registered trademark of National Semiconductor Corporation.

Revision Version: 1.03

Release Date: Dec. 2004

4

Technical Support

If a problem arises with your system during installation or operation and is unable to be resolved from the user manual, consult the following list of resources for help:

Contact the place of purchase for help. This is the recommended solution as they can provide the quickest assistance.

Visit Arima Computer Corp. website for up to the minute FAQ, guides and updates. The website can be found at: http://www.arima.com.tw/

Or contact our support staff at: server@arima.com.tw

About this User Guide

This manual contains some special icons that accompany special sections that are meant to help you along in the installation process. The special sections contain useful and/or critical information that you should know. Watch for these icons as you read through the manual.

Type of icons:

Description:

NOTE

This icon indicates useful and timely information

that will aid you in the setup.

WARNING

This icon indicates information on dangerous

and/or costly behavior to avoid.

5

Safety Instruction

Keep this manual for future reference.

Keep the equipments in a safe, cool, dry place. Perform the installation on a dry, flat surface.

Ground yourself by touching a plugged-in power supply, which displaces static electricity.

Adjust the power source to the proper voltage before connecting the equipment to the power outlet. Place the power cord in such a manner as to ensure that no one can step on it or trip over it. Always unplug the power cord when performing installation.

Do not have liquid nearby as electrical shock can occur if liquid spills onto the equipment. Pay attention to the warnings in the installation instructions when appropriate.

In the following cases, do not try to fix the problem yourself, contact a party in Technical Support The power cord or plug is damaged.

Liquid has been spilled onto the equipment.

Obvious sign of damage can be detected on the equipment.

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.

6

Chapter 1. Getting Started

1.1 Congratulations

You have in possession one of the most powerful and versatile Dual Intel Xeon processor solutions, the LH500. Powered by cutting edge Intel 7520 (MCH) chipset, LH500 efficiently utilizes the combined strength of 800MHz front side bus, PCI Express X8 and integrated SATA-II controller, to name just a few. LH500 sports independent buses for each PCI Express slot and for the SATA controller as well, providing the most efficient bus management to date. It provides versatility, performance, value and dependability for today’s computing environment. In just a couple of pages, a detailed specification will provide you with a comprehensive view of the capabilities of LH500. Thank you for purchasing Arima Computer Corp. family of products.

1.2 Unpacking

Arima Computer Corp. provides a number of accessories for your convenience. Check for the following items that come with your motherboard:

2 sets of CPU retention units

2 SATA-II Data Cable / 1 SATA power cable 1 Floppy cable

1 IDE cable

1 I/O shield

1 Driver CD

1 Quick Installation Guide

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1.2.1 Quick Installation Guide

Remark:

CN42 Front Panel

LH500-B without SATAII Controller.

Connectors

LH500-V without:

1.

PXH_2

2.

PCI-X Slot 3, 4, and 5

3.

CN9 PCI-X Slot 5 Speed Select Jumper

CN3 CN4 Memory Frequency Select Jumper

FSB

Memory

CN3

CN4

Any (Default)

Auto

1-2

1-2

533MHz

DDR266

Open

2-3

533MHz

DDR333

2-3

2-3

667MHz

DDR266

Open

Open

667MHz

DDR333

Open

2-3

800MHz

DDR266

Open

Open

800MHz

DDR333

2-3

2-3

CN8 PCI-X Slot 1 Speed Select Jumper

Open

Short

133 MHz Enabled

100 MHz Enabled

(default)

CN7 PCI-X Slot 2 Speed Select Jumper

Open

Short

133 MHz Enabled

100 MHz Enabled

(default)

CN9 PCI-X Slot 5 Speed Select Jumper

1-2

2-3

133 MHz Enabled

100 MHz Enabled

(default)

CN49 On-Board LAN Select Jumper

Open

Short

LAN Enabled

LAN Disabled

(default)

CN25 On-Board VGA Select Jumper

Open

Short

VGA Enabled

VGA Disabled

(default)

CN19 Clear CMOS Jumper

Open

1-2

2-3

Normal

Use BMC to

Clear CMOS

(default)

clear CMOS

CN29 COM2 Header CN52 LED Board

CN23 CN57 CN58

CN46

System

USB Connectors

Speaker Connector

Pin 1

PC Speaker

Pin 2

N/C

Pin 3

Int. Buzzer

Pin 4

Ground

LAN Connector Indicator Light

State of Link

Link LED

Speed LED

(Green)

(Green /

Yellow)

No Link

OFF

OFF

Link @ 10Mbps

ON

OFF

Link @ 100Mbps

ON

Green

Link @ 1000Mbps

ON

Yellow

Activity

BLINK

Recommended Memory Configurations

Memory Configuration

3rd_Pair

2nd_Pair

1st_Pair

1 pair of single rank

single rank

1 pair of dual rank

dual rank

2 pairs of single rank

single rank

single rank

1 pair of single rank and 1 pair of dual rank

dual rank

single rank

2 pairs of dual rank

dual rank

dual rank

3 pairs of single rank

single rank

single rank

single rank

2 pairs of single rank and 1 pair of dual rank

dual rank

single rank

single rank

*1 pair of single rank and 2 pairs of dual rank

dual rank

dual rank

single rank

*3 pairs of dual rank

dual rank

dual rank

dual rank

*These configurations using DDR 333 are not recommended by Intel®.

8

1.3 Features Highlight

CPU:

Supports high productivity Dual and Single Intel Xeon processors configuration LH500 does not support Prestonia 533MHz

The following diagram indicates all the major components of the motherboard.

Alternative use of PCI-X Slot 2:

For the LH500-V model, PCI-X Slot 2 can be used for 1U/2U riser card and Adaptec ZCR (zero channel RAID) card.

For the LH500-F model, PCI-X Slot 2 can be used for Adaptec ZCR card.

12

1.6 Hardware Monitor

Two kinds of hardware monitoring are provided with the motherboard.

An ADM 1026 chip is used to provide dedicated monitoring of voltages, temperatures and fan RPM. Specifically, it monitors CN30 and CN48’s voltages, CPU1 and CPU2’s temperatures, and finally, CN36 and CN39’s RPM.

A Super I/O chip provides fan RPM monitoring for CN32 and CN34.

13

Chapter 2. Hardware Installation

2.1 Mounting the motherboard

!INSTALLATION WARNING!

Use Caution When Installing the ServerBoard into the System Chassis

The components underneath the PS/2 Mouse/Keyboard connectors around the mounting hole are very FRAGILE and can be knocked off of their soldered positions, resulting in IRREPARABLE DAMAGE during installation when sliding the board into a system chassis.

Gently install the ServerBoard into the chassis, and use a Mylar Sheet to cover and protect the underside of the ServerBoard during installation. Take care NOT to scrape the bottom of the ServerBoard on the chassis stand-offs and mounting holes.

These components are necessary for many different operations, including the Mouse and the Keyboard. If you damage any of these chips, one of the symptoms is that the ServerBoard will NOT respond to key strokes through the PS/2 port and the ServerBoard will have to be replaced. Other symptoms include the loss of response or functionality in any of the rear I/O ports. Contact your authorized dealer for more information.

The Damage noted here in this WARNING may require the ServerBoard to be replaced. Due to the Nature of the Damage, this may be considered Out-of-Warranty Damage. Make certain that ALL documented procedures are followed correctly.

14

2.2 Installing the processor

LH500 operates best when dual Intel Xeon processors are in use. When using only one processor, install it in CPU_1 socket.

We discourage you from installing in the CPU_2 socket if you have only one processor to install. The result may be unpredictable.

Procedure:

First read the instructions that comes with the CPU Then consult the following the instructions which is specific to the installation for 1U system.

1. Flip over the motherboard and install the backplate. There are four holes around each CPU socket; align the backplate with the four holes around the CPU socket, insert the backplate from the back of the motherboard through the four holes. The backplate should now clamp onto the motherboard .

15

A good quality backplate should have tape over some parts of it that prevents electrical damage. Whenever possible, use high quality backplates to prolong the life of your motherboard.

2. Lift up the lever and locate the triangle marking on the CPU and CPU socket. Refer to the following picture.

16

3. Place the CPU with the correct orientation (B) as shown in the following pictures. The lever is still up and the two triangles are in the same corner.

The CPU will not fit if the orientation is wrong. Do not try to force the CPU into the socket; it could result in irreparable damage to the CPU.

17

4. Lower the socket locking lever in place.

5. Now, rest the motherboard into the chassis, align the four holes of the backplate with the four bolts of the chassis.

We do not recommend you to apply thermal grease at this point of the installation. The heatsink provided already has thermal grease on the bottom for your convenience. Do not apply more thermal grease if it is already present. Too much thermal grease will spill onto the CPU circuit and damage the CPU.

18

6. Mount the CPU heatsink to the top of the CPU and socket. Align the screws of the heatsink with the four holes of the backplate and the chassis bolts, then fasten them securely.

Repeat the steps for the installation of another CPU.

Heatsink not included in the package.

19

2.3 Installing the memory

2.3.1 DIMM combination

The following diagram indicates the locations of memory sockets, captioned 1st_Pair_A through 3rd_Pair_B.

Types of memory supported:

Six sockets of 184-pin 2.5Volt DDR DIMM supporting DDR-333/266.

As indicated on the diagram, they are running on dual channel memory bus and two-way interleaved memory banks. Therefore, the memory must be INSTALLED IN PAIRS. The first pair must be installed in the “1st_Pair_A” and “1st_Pair_B” locations as indicated in the diagram. The second pair must be installed in the “2nd_Pair_A” and “2nd_Pair_B” locations, and so on. Be sure that every memory pair is of the same speed, size and rank.

20

DDR memory types are determined by two factors: speed and rank. LH500 supports DDR 333/266 speed in both single/dual rank. The rank of your memory could impact the effectiveness of the motherboard. Table 1 indicates the setup that LH500 has been tested on.

The number of memory chips and how they are stacked on a memory module do not indicate the rank of that memory module. The only way to determine the rank of a memory module is to contact the memory manufacturer for its specification.

The first row reads: if you use 1 pair of DDR of type single rank, install in 1st_Pair slots.

Table 1.

Memory Configuration

3rd_Pair

2nd_Pair

1st_Pair

1 pair of single rank

single rank

1 pair of dual rank

dual rank

2 pairs of single rank

single rank

single rank

1 pair of single rank

dual rank

single rank

1 pair of dual rank

2 pairs of dual rank

dual rank

dual rank

3 pairs of single rank

single rank

single rank

single rank

2 pairs of single rank

dual rank

single rank

single rank

1 pair of dual rank

*1 pair of single rank

dual rank

dual rank

single rank

2 pairs of dual rank

*3 pairs of dual rank

dual rank

dual rank

dual rank

*These configurations using DDR 333 are not recommended by Intel®.

Any configuration other than the recommended is not guaranteed to work. Please refrain from using those configurations as we cannot provide technical support on them.

21

2.3.2 Installing DIMM modules

1. Open up the brackets:

2. Line up the memory with socket. Make sure the gap fits into the socket.

22

3. Push in the memory stick until bracket can be closed securely onto the stick. Make sure the brackets hold onto the memory module.

These pictures only show one memory stick but remember to install them in pairs.

23

2.4 Jumpers Configuration

2.4.1 Clear CMOS header

Header CN19 controls CMOS setting. Position your motherboard as it appears in the following diagram. Pin 1 is on the side of PCI slots, whereas pin 3 is on the side of the power supply connectors. To clear CMOS: